Add snippets for c++

_config/nvim/UltiSnips/cpp.snippets

@@ -0,0 +1,16 @@
+snippet main
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    printf("Hello, World!\n");
+
+    return 0; 
+}
+endsnippet
+
+snippet fori
+for (int $1 = $2; $1 < $3; $1++) {
+    $0
+}
+endsnippet